CVE-2026-25789

Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://cert-portal.siemens.com/productcert/html/ssa-688146.html

Configurations

No configuration.

History

12 May 2026, 10:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 10:16

Updated : 2026-07-14 10:16

NVD link : CVE-2026-25789

Mitre link : CVE-2026-25789

CVE.ORG link : CVE-2026-25789

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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"defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.1.6", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.1.6", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518F-4 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.1.6", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-05-12T10:16:45.037", "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-688146.html", "source": "productcert@siemens.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "productcert@siemens.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft."}], "lastModified": "2026-07-14T10:16:32.447", "sourceIdentifier": "productcert@siemens.com"}